Slider for separable fasteners



March 12, 1940. l` G, SQAVE I 2,193,080

SLIDER FOR SEPARABLE FASTENERS Filed march 22, 1938 2 Sheets-Sheet l MMV ATTORN EYS Mrch 12, 1940. J Q SOAVE y 2,193,080

SLIDER FOR SEPARABLE FASTENERS Filed March 22, 1938 2 sheets-snet 2 WITNESS INVENToR l ATTORN EYS.

UNITED STATl This invention relates to sliders for separable Patented Mu. 12, 194e 2,193,0so suona Fon saumons FAsTENEns .mm Giovanni soave, un; Island city, Nfy., assignor to Waldes Koh-I-Noor, Inc., Long. Island City, N. Y., a corporation of New York n Application March 22, 1938, Serial No. 197,345

6 Claims. (CL 24205) ES PATENT OFFICE frayed and broken thereby giving the fastener cessive weanof the parts of which such fastener is constituted.

separable fasteners of the type above indicated are well known and usually comprise a 10 pair of stringers having rows of interlocking elements attached along the opposed edges thereof Y and a slider embracing both rows of elements and movable along such rows for interlocking or 4disengaging the elements. 'Ihe fastener strucll ture may include covering means for the elements, such as, fabric or rubber, which coverings overlie the elements and extend from the root or attached portions of the elements out to approximatelythe outer projecting ends of the elements so that when the rows of elements have been interlocked by the slider, the outer edges of the covering strips meet and thereby hide the elements from view. In such fastener constructions the slider, which usually comu prises a pair of spaced plates, also embraces the element covering strips. Movement of the slider on the -fastener is usually accomplished by manual operation of a linger tab which is pivotally attached to a projection provided on one plate 30 of the slider, usually the outer one', and such tab is vsometimes provided with locking pins or iingers which when the tab is moved into a substantially horizontal position, entera recess provided in the outer plate of the slider and engage 35 with the interlocking elements positioned between the spaced plates of the slider. vThis type of slider lock has always been constructed on the theory that it must function as a positive bar to the movement ofthe elements through the 40 slider and its effectiveness depended upon the locking pin or finger being so disposed on the slider and of such length that it could be in`' serted into the space between adjacent interlocking elements and when so positionedfextend- 45 ed sumciently into the path of such elements so as to effectively prevent movement of the slider `with respect to such elements. 'While such a; construction may be satisfactory for those separable fasteners in which the elements thereof 50 are not concealed by covering material, it has 'not been at all satisfactory for separable fasteners in which the elements are covered because the locking pin must necessarily penetrate -the covering materialin order to4 function prop- 55 erly and after awhile such material becomes an unsightly appearance.

,- According to this invention the nger or pull tab of the slider is provided with one or `rnore cams or lugs which are adapted to extend 5 through a recess provided in the top plate of the slider and engage the upper surfaces only of the elements o r in the case where the slide fastener is covered, to engage those portions of the covrering material which overlie the elements positioned beneath the lugs in their locked condition.

The lugs are made wider than the width of the spaces between the interlockingelements so that they cannot be inserted therebetween but only effect a camming action on such elements. Co-

' operating with each lug provided on the pull tab, .is an interior recess provided in the bottom plate of the slider, into which, the interlocking elements engaged by the lugs are forced and one end at least of which is formed to provide a distnct shoulder which functions 'as a stop to prevent longitudinal movement of theA interlocking elements through the slider.

The advantages of this locking means as well as the novel details of construction thereof will become more apparent after a perusal of the following description taken in connection with the accompanying drawings in which Fig. 1 is a plan view of a covered fastener structure provided with a slider having a. lock made inaccordance with this invention, the pull tab being shown in locked position; Figs. 2 and. 3 are sections taken along the lines 2`2 and 3 3, respectively, of Fig. l; Fig. 4 is aside view of the slider shown-in Fig. 1; Fig. 5 is a section taken along 35v the line 5-5 of Fig. 4 to show the recesses in the bottom plate more clearly While Fig. 6 is a section taken. along the line 6 6 of Fig. 4 to illustrate the relative positions of the camming lugs and recesses in the locked position of the former; Fig. l is a plan view of a modied form of thevslider shown in Fig. 1; Fig. 8 is a view similar to Fig. 5 of the slider illustrated in Fig. 'I and Fig. 9 is -a section taken along the line 9-9 of Fig. 7. 5

Referring more particularly to Figs. 1 to 3 of the drawings, the numeral I0 designates the slider which controls the locking and interlocking of the rows of elements Il and I2, the individual elements of which are attached in staggered relation to the stringers I3 and i4, respectively, and are covered by the fabric covering strips I5, the latter of which preferably form part of the fabric material of which the stringers I3 and I4 are constituted. Actuation of. slider 55 I 0 is accomplished by manual operation of the pull tab I6 which has its lower end pivoted at I1 to the lug I8 provided on the upper or outer plate I9 of the slider. In the drawings, the pull tab is shown inv the position it should be while the slider is at rest, but when the slider is to be actuated such tab is raised about its pivot in or der to facilitate the movement of the slider. During the sliding movement of the slider the rows of elements II and I2 and the covering strips I5 which overlie the upper surfaces of such elements enter into the channels formed, between the spaced plates I9 and 20 of the slider. As is clearly shown in the drawings,` the pair of channels 2| and 22 at the upper portion-lof the slider are vangularly disposed to one another and converge into a single channel 23 disposed adjacently below the apex of the wedge-shaped section 24, the converging channels 2| and 22 feeding the rows of elements into proper relation to be interlocked when they reach channel 23 as the slider is moved upwardly or to the right, as viewed in Fig. 1 and the wedge-shaped section 24 forcing the interlocked elements apart into disengaged condition when the slider is moved in the opposite direction or downwardly.

The pull tab I6 is provided at its lower or pivoted endv with a pair of spaced locking lugs 25 which are arranged thereon so that they enter ,and extend through the openings 26 provided in the top plate I9 of the slider when thel pull is moved to the position shown in Figs. 1 to 3. -As can be seen from Figs. 2 and 3, the spaced lugs 25, which are positioned at substantially right angles to the pull tab I6, have their attached ends or root portions disposed in line with the pivotal axis of the pull tab I6 but extend outwardly from such pivotal axis atan angle greater than the angle between the tab and a plane passed through suchpivotal axis at right angles to the length of the tab, so that the outer ends of such lugs project beyond the lower endv of the tab I6. The openings 26 are disposed laterally from the centrallongitudinal line of the slider and extend lengthwise of the slider on each side of the lug I8 such openings being preferably just sumciently long to provide no hindrance to the lugs 25 throughout their range 'of movement. Disposed beneath the openings 26 are a pair of longitudinally extending recesses 21 formed/out oi' the material of which the bottom plate 20 of the slider is constituted and disposed side by side in spaced relation intermediate the side flanges of such bottom plate and thecentral longitudinal portion thereof as is shown more clearly in Fig. 5,. The recesses 21 each consist of a substantially vertical end shoulder 28 extending transversely to the path of travel of the elements in the rows and an inclined bottom surface 29 which extends upwardly from the bottom of the shoulder 28 towards the rear or lower end of the slider to the interior surface of the bottom plate 20 of the slider, as is shown more clearly in Figs. 2 toV 4. Due to this form of the recesses it is evident that the recesses will not interfere with the free movement of the fastener elements through the slider when the latter is movedi up- ),wardly or to the right, as viewed in Fig. 2, while when the slider is moved in the opposite direction, the attaching ends of the fastener elements i terial of the stringers to which the attaching ends of such elements are secured and the longitudinal the pull tab forced down by the operator to al substantially horizontal position, as 'is shown in vthe drawings, the locking lugs 25 will enter the recesses 26 and bear down against the stripsof material covering the interlocking elements thereby .forcing the attaching ends of the elements disposed therebeneath by a camming ac-.

tion into the recesses 21. As the interlocking ends of the fastener elements overlie the longitudinal central portion III of the bottom plate 20 which functions as a stop against inward movement ofsuch ends by'the locking lugs 25, the camming action of the locking lugs Aupon Vthe attaching ends of the elements will not disturb the normal alignment of such interlocking ends of the elements as are acted upon with the interlocking ends of the other elementsof the rows but will cause the attaching ends of the elements disposed above such recesses to pivot or rock inwardly about their interlocking ends, whereby the attaching ends of the elements affected are forced into interlocking engagement with such recesses without materially disturbing the eective locking position of the interlocking ends of such ele ments in the rows. 'I'he portions of the locking lugs 25 which engage with the covering portion of the separable fastener have a width greater than the width between the individual locking elements so that such lugs cannot enter into the spaces between the elements but exert their whole force in a downward direction to cam the attaching ends of the interlocking elements into the recesses 21. The length of each of the recesses is approximately equal to the width of two of the elements plus the width of the space therebetween so that at least two of the elements may be .contained in such recess at the same time. In the locking of the elements in the recesses 21,

disposed\.directly upon theupp'er surface of the, element thereby forcing such element into locked position against the bottom of the recess and the shoulder 28 and causing the pull tab to be tilted slightly about its axis so that the elements disposed beneath the locking lug on the other side of the tab I6 will be placed under an increased pressure. The outer end portions of the locking lugs 25 are rounded to facilitate the camming action cf' such lugs and to reduce the possibility of wear on the covering strips I5 and due to thefact that lsuch portions are slightly offset from the pivotal axis of the pull tab I6, the latter will be locked in horizontal position until positively moved from such position preparatory to moving the slider along the rows of interlocking elements. This arrangement of the parts also causes the slider to be moved in the .opposite or forward direction when the pull tab is lifted, to withdraw that shoulder 2l of the slider whose face is in locking engagement with the attaching end of an interlocking element thereby placing the parts in a condition for ready operation of 'the forcing of the pull tab I6 downinto horithe slider with free movement of the elements ings.

' therethrough. As has been indicated above the shoulders 28 of the recesses 21 are positioned so as to be substantially below the outer end portions of the locking lugs when the locking tab is disposed in a horizontal position and slightly in back of the wedge-shaped section 24.U

It willbe appreciated from the foregoing that the slider locking means of this invention will successfully accomplish the purposes for which lthat the covering material overlying the elements will be in no way injured or subjected to such excessive wear that it will break down or become unsightly through usage.

Instead of positioning the camming lugs 25 and the forward vertically disposed shoulders 2B of the recesses 21 in line with each other, as is illustrated in Figs. 1 to 6, the camming lugs 25 on the pull tab i6 may be staggered so thatA each of such lugs will assume thesame relation with respect to the interlocking elements in the row with which it cooperates when the pull tab I6 is forced into its horizontal locking position and the shoulders 28 may also be staggered so that an element the wedge-shaped section 33 than is the camming lug 34. The recess in the lower plate of the slider is staggered with respect to the recess 36 so that when the tab is disposed in horizontal position the outer portions of the camming lugs 3i and 34 will be disposed almost directly above Ithe forward vertical shoulders of such recess and each cooperating lug and recess will be capable of locking and interlocking elements in-one of the rows against the vertical shoulder oi the recess, as shown for example in Fig. 2 of the drawpivotal axis of the pull tab so that when the latter is in horizontal position, their effective forces will tend to maintain the pull tab in locked posi-f* back of the interlocking portions thereof only' engage in suchrecesses, may be made suiliciently wider to accommodate the` whole of an interlocking element and in the form illustrated inFig. 5v

maybe formed as one recess without any intermediate raised portion therebetween. i It is evident that other changes in the construction and form of the slider may be madeV without departing from the spirit of the invention or from the scope of the following claims.

JI claim:

1. A slider for a separable fastener having rows of rigid fastener elements attached at their inner ends to the opposed edges of a pair of In this construction it is preferable that. .the camming lugs be disposed with respect-to the stringers and adapted their outer ends to interlock in interilngered relation, comprising a top and a bottom plate secured together, said top plate having an opening extending therethrough laterally from the central longitudinal line of the slider, a member pivotally connected to said top plate and having a lug adapted to enter the said opening and to press the attached end of an element disposed beneath said opening, said bottom plate having a depression beneath said lug terminatingin an end wall in the path of the attached end of an element depressed by said lug and a relatively elevated central longitudinal portion beneath the .interlocking ends -oi the elements, said central longitudinal portion serving as a bearing on which the elements are rocked as their attached ends are depressed by said lug into the depression, whereby the interlocking ends of the elements are relatively un- 'disturbed `from their normal interlocking alignment while the attached ends of the elements depressed into the depression are prevented' from moving byA thesaid end wall ofthe depression.

2. A slider such as is defined in claim 1, in which the lug is wider at its element engaging end than the width of the spaces between adjacent fastener elements in the rows and the depression has an inclined bottom surface rising from the lower edge ofthe said end wall thereof towards an .end of the slider.

3. A slider such as is defined in claim 1, in which said top anbottomvplates have formed therebetween a Y-shaped passage for guiding the fastener elements into and out of interlocked engagement and said end wall of the depression is positioned adjacently to the juncture of the divergingarms of such channel, the'bottom surface of the depression being inclined upwardly from the lower edge of said end wall towards the outer end of the central leg of such channel.

4. A slider such as is deiined in claim l, in. which said top and bottom plates have formed therebetween a Y-shaped passage for guiding the fastener elements into and out of interlocked engagement and said end wall of the depression is positioned adjacently to the juncture of the diverging arms of such channel and said lug is attached to said pivotal member substantially in line with the pivotal axis of the latter and extends outwardly therefrom to form an obtuse angle therebetween, said lug being adapted to move the slider relative to the fastener elements in the direction in which said member is pivoted to bring the depressed attached end of the element engaged thereby into closer relation with said end. Wall. t

5. A slider for a separable fastener having rows `of rigid fastener elements attached at their inner ends to the opposed edges of a pair of stringers and adapted at their outer ends to interlock in interngered relation', comprising a top and bottom plate secured together, said top plate having a pair of spacedv openings disposed laterally from the central longitudinal line of the slider and on each side thereof, a pull tab plvotally connected to said top plate and having a pair of lugs adapted tofenter the said openings and to press the attached ends of elements disposed beneath said openings, said bottom plate having arpair of depressions beneath said lugs terminating in end walls in the path oi the attached ends of the elements depressed by said lug and a relatively elevated central longitudinal portion beneath the interlocking ends of the elements and intermediate the depressions-said central longitudinal portion serving as a bearing on which vthe elements of each row are rocked as their attached ends are depressed bysaid lugs into the depressions whereby the interlocking ends of the elements are relativelyv undisturbed from their normal interlocking alignment while the attached,

staggered relation to each other and the bottom surfaces thereofincline upwardly from the lower edges of said walls to the interior surfaces of the bottom plate and said lugs are in staggered relation to each other, at least one of said lugs extending forwardly from the pivotal axis of said lpull tab to such an extent that in the limited and locked position of said pull tab such lug will maintain said tab in locked position.

JOHN GIOVANNI SOAVE. 

